<template>
  <div>
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>参数列表</el-breadcrumb-item>
    </el-breadcrumb>

    <el-card>
       <el-alert show-icon title="注意" type="warning" :closable="false">
      </el-alert>
      <el-row class="cat_opt">
        <el-col>
          <span>选择商品分类：</span>
          <el-cascader expand-trigger="hover" v-model="selectedCateys"
           :options="catelist" :props="cateProps" @change="handleChange"></el-cascader>
        </el-col>
      </el-row>
      <!-- tab页签 -->
      <el-tabs v-model="activeName" @tab-click="handleTabClick">
        <el-tab-pane label="动态参数" name="many">
          <el-button type="primary" size="mini" :disabled="isBtnDisabled" @click="addDialogVisible = true">添加参数</el-button>
          <!-- 动态参数表格 -->
          <el-table :data="manyTableData" border stripe>
            <el-table-column type="expand">
              <template slot-scope="scope">
                <el-tag v-for="(item, i) in scope.row.attr_vals" :key="i" closable @close="handleClose(i,scope.row)">{{item}}</el-tag>
                <!-- 输入文本框 -->
                <el-input class="input-new-tag" v-if="scope.row.inputVisible" v-model="scope.row.inputValue" ref="saveTagInput" size="small" @keyup.enter.native="handleInputConfirm(scope.row)" @blur="handleInputConfirm(scope.row)"></el-input>
                <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
              </template>
            </el-table-column>
            <el-table-column type="index"></el-table-column>
            <el-table-column label="参数名称" prop="attr_name"></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button type="primary" icon="el-icon-edit" @click="showEditDialog(scope.row.attr_id)">编辑</el-button>
                 <el-button type="danger" icon="el-icon-delete" @click="removeParams(scope.row.attr_id)">删除</el-button>
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
        <el-tab-pane label="静态属性" name="only">
          <el-button type="primary" size="mini" :disabled="isBtnDisabled" @click="addDialogVisible = true">添加属性</el-button>
           <el-table :data=" onIyTableData" border stripe>
             <el-table-column type="expand">
              <template slot-scope="scope">
                <el-tag v-for="(item, i) in scope.row.attr_vals" :key="i" closable @close="handleClose(i,scope.row)">{{item}}</el-tag>
                <!-- 输入文本框 -->
                <el-input class="input-new-tag" v-if="scope.row.inputVisible" v-model="scope.row.inputValue" ref="saveTagInput" size="small" @keyup.enter.native="handleInputConfirm(scope.row)" @blur="handleInputConfirm(scope.row)"></el-input>
                <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
              </template>
            </el-table-column>
            <el-table-column type="index"></el-table-column>
            <el-table-column label="属性名称" prop="attr_name"></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button type="primary" icon="el-icon-edit" @click="showEditDialog(scope.row.attr_id)">编辑</el-button>
                 <el-button type="danger" icon="el-icon-delete" @click="removeParams(scope.row.attr_id)">删除</el-button>
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
      </el-tabs>
    </el-card>
    <!-- 添加参数 -->
    <el-dialog :title="'修改' + titleText" :visible.sync="addDialogVisible" width="50%" @close="addDialogClosed">
      <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" class="demo-ruleForm">
        <el-form-item :label="titleText" prop="attr_name">
          <el-input v-model="addForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
  <span slot="footer" class="dialog-footer">
    <el-button @click="addDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="addParams">确 定</el-button>
  </span>
</el-dialog>

<!-- 修改参数对话框 -->

    <el-dialog :title="'修改' + titleText" :visible.sync="editDialogVisible" width="50%">
      <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="100px" class="demo-ruleForm">
        <el-form-item :label="titleText" prop="attr_name">
          <el-input v-model="editForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <!-- @close="editDialogClosed" -->
  <span slot="footer" class="dialog-footer">
    <el-button @click="editDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="editParams">确 定</el-button>
  </span>
</el-dialog>
  </div>
</template>

<script>
export default {
  data(){
    return{
      catelist:[],
      cateProps:{
        value:'cat_id',
        label:'cat_name',
        children:'children'
      },
      selectedCateys:[],
      activeName:'many',
      // 动态属性
      manyTableData:[],
      // 静态属性
      onIyTableData:[],
      addDialogVisible:false,
      addForm:{
        attr_name:''
      },
      addFormRules:{
        attr_name:[
          {required:true,message:"请输入参数名称",trigger:'blur'}
        ]
      },
      editDialogVisible:false,
      editForm:{},
      editFormRules:{
        attr_name:[
          {required:true,message:"请输入参数名称",trigger:'blur'}
        ]
      },
    }
  },
  created(){
    // 获取所有的商品分类
    this.getCateList()
  },
  methods:{
    async getCateList(){
      const {data:res} = await this.$http.get('categories')
      if(res.meta.status !== 200){
        return this.$message.error('获取商品分类失败')
      }
      this.catelist = res.data
      console.log(this.catelist);
    },
    handleChange(){
       this.getParamsData()

    },
    handleTabClick(){
       this.getParamsData()
      console.log(this.activeName);
    },
    async getParamsData(){
      if(this.selectedCateys.length !== 3){
        this.selectedCateys = []
        this.manyTableData = []
        this.onIyTableData = []
        return
      }
      const {data:res} = await this.$http.get(`categories/${this.careId}/attributes`,{
        params:{sel:this.activeName}
      })
      if(res.meta.status !== 200){
        return this.$message.error('获取列表失败')
      }
      
      res.data.forEach(item =>{
         item.attr_vals=item.attr_vals ? 
         item.attr_vals.split(' ') : []
        //  添加控制文本框的显示和隐藏
        item.inputVisible = false
        item.inputValue = ''
      })
      console.log(res.data);
      if(this.activeName === 'many'){
        this.manyTableData = res.data
      } else {
        this.onIyTableData = res.data
      }
    },
    addDialogClosed(){
      this.$refs.addFormRef.resetFields()
    },
    addParams(){
      this.$refs.addFormRef.validate(async valid => {
        if(!valid) return
        const {data:res} = await this.$http.post(`categories/${this.careId}/attributes`,{
          attr_name:this.addForm.attr_name,
          attr_sel:this.activeName
        })
        if(res.meta.status !== 201) {
          return this.$message.error('添加失败')
        }
        this.$message.success('添加参数成功')
        this.addDialogVisible = false
        this.getParamsData()
      })
    },
    async showEditDialog(attr_id){
      const{data:res}= await this.$http.get(`categories/${this.careId}/attributes/${attr_id}`,
      {
        params:{attr_sel:this.activeName}
      })
      if(res.meta.status !== 200){
        return this.$message.error('失败')
      }
      this.editForm = res.data
      this.editDialogVisible = true
    },
    editDialogClosed(){
      this.$refs.editFormRef.resetFields()
    },
    editParams(){
      this.$refs.editFormRef.validate( async valid => {
        if(!valid) return
        const{data:res} = await this.$http.put(`categories/${this.careId}/attributes/${this.editForm.attr_id}`,{attr_name:this.editForm.attr_name,attr_sel:this.activeName}) 

        if(res.meta.status !== 200){
          return this.$message.error('修改参数失败')
        }
        this.$message.success('修改成功')
        this.getParamsData()
        this.editDialogVisible = false
      })
      
    },
    async removeParams(attr_id){
      const conStr = await this.$confirm('此操作将永久删除该参数, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err => err)

        if(conStr !== 'confirm') {
          return this.$message.info('已取消删除')
        }
        const {data:res} = await this.$http.delete(`categories/${this.careId}/attributes/${attr_id}`)

        if(res.meta.status !== 200){
          return this.$message.error('删除失败')
        }
        this.$message.success('删除成功')
        this.getParamsData()
    },
    // 文本框失去焦点或按下回车会出发
    async handleInputConfirm(row){
      if(row.inputValue.trim().length === 0) {
        row.inputValue = ''
         row.inputVisible = false
         return
      }
      row.attr_vals.push(row.inputValue.trim())
      row.inputValue = ''
      row.inputVisible = false
      this.saveAttrVals(row)
    },
    showInput(row){
      row.inputVisible = true
      // 让文本获得焦点 $nextTick 当页面上的元素重新渲染后才可以执行这行代码
      this.$nextTick(_ => {
          this.$refs.saveTagInput.$refs.input.focus();
        });
    },
    async saveAttrVals(row){
            const {data:res} = await this.$http.put(`categories/${this.careId}/attributes/${row.attr_id}`,{
        attr_name:row.attr_name,
        attr_sel:row.attr_sel,
        attr_vals:row.attr_vals.join(' ')
      })
      if(res.meta.status !== 200){
        return this.$message.error('添加失败')
      }
      this.$message.success('添加成功')
    },
    handleClose(i,row){
      row.attr_vals.splice(i,1)
      thia.saveAttrVals(row)
    }
  },
  computed:{
      isBtnDisabled(){
        if(this.selectedCateys.length !== 3) {
          return true
        }
        return false
      },
      careId(){
        if(this.selectedCateys.length === 3){
          return this.selectedCateys[2]
        }
        return null
      },
      titleText(){
        if(this.activeName === 'many'){
          return '动态参数'
        }
        return '静态属性'
      }
    }
}
</script>

<style lang="less" scoped>
.cat_opt{
  margin: 15px 0;
}
.el-tag{
  margin: 10px;
}
.input-new-tag {
  width: 150px;
}

</style>